The wonderful green spiral was snapped over the rock of Bleik Island 300km inside the Arctic circle. The image was taken from the neighbouring isle of Andoya, a peat covered expanse with some mountains rising above the bogs. The colour is emitted by excited atoms of nitrogen a hundred kilometres up as they are tickled by the energy of a solar flare event. Bleik is famed for one of Europe’s largest puffin colonies.
Image credit: Frank Olsen via EPOD